Improvement in piano-locks



A. S. BLAKE.

PIANO-LOCK.

No. 176,506. Patented Apri1z5-1a7e.

WITNESSES z @Wj ib ATTDRHEYS.

N-PETERS, FHDTO-LITHOGRAFNER. WASHINGTON. D. C.

NTTED STATES PATENT OFFICE.

AMOS S. BLAKE, OF WATERBURY, CONN EGTIUT.

IMPROVEMENT IN PIANO-LOCKS.

Specification forming part of Letters Patent No. [76.506, dated April25, 1876; application filed October 23, 1875.

To all whom it may concern Be it known that I, AMOS S. BLAKE, ofWaterbury, in the county of New Haven and State of Connecticut, haveinvented a new and useful Improvement in Locks, of which the followingis a specication:

Figure lis a side view of my improved lock, part of the case beingbroken away to show the construction. Fig. 2 is a detail section of thesame, taken through the line w w, Fig. 1. Fig. 3 is a detail section ofthe same, taken through the line y y, Fig. 1.

Similar letters of reference indicate corresponding parts.

The object of this invention is to furnish an improved lock of that kindin which the lockbolt hooks upon the catchplate, and which shall besimple in construction, inexpensive in manufacture, and reliable in use.

The invention consists in lthe lock-case, formed of two plates, bybending up the side and end edges, and bending over the end edges of theone plate and slipping the other plate into the seat thus formed.

A is the main plate ot' the lock-case, the side and end edges of whichare bent upward at right angles to form the sides and ends of the ease,and the edges of the ends are bent inward at right angles to formflanges beneath which the top plate B ot' the case is slid, as shown inFigs. l, 2, and 3. The case is thus put together, without screws orrivets, except the rivets that secure its turned-up forward side to theface-plate G. D is the bolt, the hooked forward end of which passes outthrough a slot in the face-plate O. The rear end of the bolt D has acircular head formed upon it which works in a circular recess in theplate E, which is fitted into the cavity of the case vA B, as shown inFig. 1. The hook-bolt D and the pivot-plate E may be cut out of onepiece, so that there will be little waste of material. F is a bent wirespring, one arm of which is straight, and extends along the in ner sideof one end of the case A B. The other arm of the spring F is curved sothat its end may rest against the convex edge of' the hook-bolt D, andthus hold it in either position. In the circular head otl the bolt D isformed a slot to receive the key, which is inserted through a round holein the plates AB ot' the case.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- The lock-case, formed of the plates A B,vby bendingup the side and end edges and bending over the end edges of the plate A,and slipping the plate B into the seat thus formed, substantially asherein shown and described.

AMOS S. BLAKE.

Witnesses:

Gnus. W. GILLETTE, GEORGE B. BRISTOL.

